Designing meso- and macropore architectures in hybrid organic–inorganic membranes by combining surfactant and breath figure templating (BFT)
Literature Information
Ozlem Sel, Christel Laberty-Robert, Thierry Azais, Clément Sanchez
Hybrid “organic–inorganic” membranes are synthesized by growing a functionalized mesoporous “sol–gel”-derived SiO2 network into a hydrophobic fluorinated polymer. Processing guidelines are proposed to optimize the porosity at the macro-, meso- and micro-scales by templating the surface of the membrane through a modification of the thermal processing at 30–80 °C in air. Such a hierarchical design exploits the benefits of the facile water retention of the breath figure to produce membranes with high proton conductivity (50 mS cm−1 at 70 °C) under 100% relative humidity and develops the surface area and the interfacial area between the hydrophobic and hydrophilic domains.
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